In the second in the series of Citizen Science webinar, i have presented a brief story of the how the concepts behind chemistry evolved over the period of thousands of years and how our knowledge of the world has drastically changed especially after we solved the greatest puzzle ever solved by humankind, the modern periodic table. Due to some technical issue, some part of the recording was not available, pdf will be uploaded soon after a retake.
Pdf of the presentation is given here. History and Mystery of chemistry.